Astronomy Crossword

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Across
  1. 3. nuclear ________
  2. 4. failed star (2 words)
  3. 6. most common element
  4. 8. when stars move away
  5. 11. our galaxy (2 words)
  6. 13. nextdoor galaxy (name)
  7. 14. no escape (2 words)
  8. 15. large, cold and old star
  9. 17. inward force of stars
  10. 18. star nursery
  11. 19. makes light, small atoms
  12. 20. heaviest fusion element
Down
  1. 1. when stars get closer
  2. 2. where fusion occurs
  3. 4. made hydrogen (2 words)
  4. 5. all baby stars make this
  5. 7. how big stars appear
  6. 9. makes atoms beyond iron
  7. 10. common star (2 words)
  8. 12. dead star (2 words)
  9. 16. brightest star in sky
  10. 17. cluster of stars
  11. 19. closest star to earth